How are you setting the ports.  Through the LAT registers?

Regards,
Bob


On Mon, 14 Mar 2005 07:14:45 -0800 (PST), alan smith
<micro_eng2@yahoo.com> wrote:
> Over the weekend, I was coding up part of a project
> using  a SHT71 and ran into something strange.  I can
> post the sections of code if thats helpfull but not
> sure if its needed.
> 
> Basically, I set up the ports:
> #define  SHT_Data  PORTC,0
> #define  SHT_Clk   PORTC,1
> #define  SHT_DD    TRISC,0
> 
> So, down in the main routine I had a simple routine
> (yes the clock is set to an output)
> 
> bsf   SHT_DD,ACCESS  ; make the port an input
> ...
> btfss SHT_Data,ACCESS
> bra   BitLow
> bra   BitHigh
> 
> Simple right? Done it for years, just branch on the
> bit settings.  I have my analyzer hooked up, watching
> the data where I send the command code and look for
> the AWK to return.  But, it *appears* to ignore the
> value on the port. I looked at the watch window and it
> reports back like it hasnt seen the value showing.  Is
> there something different that has to be done on an
> 18F part?  I'd think not, but who knows...
> 
> I switched to a different port to see if it made any
> difference, but it didnt so I can pretty much rule out
> the part being bad.
> 
> In general, as far as internal registers, the
> btfss/btfsc opcode works fine.  Just when interfacing
> to external ports it appears to not work as I thought.
> 
> Any thoughts?
> 
> __________________________________
> Do you Yahoo!?
> Yahoo! Small Business - Try our new resources site!
> http://smallbusiness.yahoo.com/resources/
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist